If you need to rough out cast iron I’ve found that an old knackered carbide tool can do the job from the back side, the parting tool side, with the back gear on low speed.
The machine just chews its way through the bulk of the work and no mess.
I’ve done a bunch of awkward cast iron castings over the last few days, turning them into user ready stock.
With the back gear engaged, instead of cast iron bits flying all over the shop, including into your hair and down your collar, you get a nice neat mound of cast iron swarf building up behind the lathe which can be sooked up in a few seconds by a vac.
Once the roughing out is done then you can do finishing cuts from the front with a decent carbide tool and a higher speed for a better finish.
Edited By ady on 03/02/2011 00:02:04